For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_utilities/openSUSE_Factory_ARM/home:ojkastl_buildservice:Branch_utilities.repo
zypper refresh
zypper install gitui
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_utilities/openSUSE_Factory/home:ojkastl_buildservice:Branch_utilities.repo
zypper refresh
zypper install gitui
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_utilities/15.6/home:ojkastl_buildservice:Branch_utilities.repo
zypper refresh
zypper install gitui