$ git clone -n https://src.fedoraproject.org/rpms/tango-icon-theme.git /var/lib/mock/f45-build-46411-834/root/chroot_tmpdir/scmroot/tango-icon-theme
Cloning into '/var/lib/mock/f45-build-46411-834/root/chroot_tmpdir/scmroot/tango-icon-theme'...
$ git fetch origin d7de23221820e21e74e672b6fc0470a9e711ae74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tango-icon-theme
 * [new ref]         d7de23221820e21e74e672b6fc0470a9e711ae74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7de232 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild