$ git clone -n https://src.fedoraproject.org/rpms/obs-service-set_version.git /var/lib/mock/f45-build-20424-570/root/chroot_tmpdir/scmroot/obs-service-set_version
Cloning into '/var/lib/mock/f45-build-20424-570/root/chroot_tmpdir/scmroot/obs-service-set_version'...
$ git fetch origin fe15da2d4b57df69b263850ed000a69502853ab4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/obs-service-set_version
 * [new ref]         fe15da2d4b57df69b263850ed000a69502853ab4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe15da2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild