For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mwilck:branches:devel:tools/openSUSE_Tumbleweed/home:mwilck:branches:devel:tools.repo
zypper refresh
zypper install qemu-block-dmg
For openSUSE Factory zSystems run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mwilck:branches:devel:tools/openSUSE_Factory_zSystems/home:mwilck:branches:devel:tools.repo
zypper refresh
zypper install qemu-block-dmg
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mwilck:branches:devel:tools/openSUSE_Factory_PowerPC/home:mwilck:branches:devel:tools.repo
zypper refresh
zypper install qemu-block-dmg
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mwilck:branches:devel:tools/openSUSE_Factory_ARM/home:mwilck:branches:devel:tools.repo
zypper refresh
zypper install qemu-block-dmg
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mwilck:branches:devel:tools/15.4/home:mwilck:branches:devel:tools.repo
zypper refresh
zypper install qemu-block-dmg