$ git clone -n https://src.fedoraproject.org/rpms/hicolor-icon-theme.git /var/lib/mock/f45-build-13420-450/root/chroot_tmpdir/scmroot/hicolor-icon-theme
Cloning into '/var/lib/mock/f45-build-13420-450/root/chroot_tmpdir/scmroot/hicolor-icon-theme'...
$ git fetch origin 097281c35d7451e51d03b8ff44eceac903e5c9cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hicolor-icon-theme
 * [new ref]         097281c35d7451e51d03b8ff44eceac903e5c9cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 097281c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild