$ git clone -n https://src.fedoraproject.org/rpms/opusfile.git /var/lib/mock/f45-build-21201-580/root/chroot_tmpdir/scmroot/opusfile
Cloning into '/var/lib/mock/f45-build-21201-580/root/chroot_tmpdir/scmroot/opusfile'...
$ git fetch origin e6461178a83664a4bf56f1913d07cd66e84909f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opusfile
 * [new ref]         e6461178a83664a4bf56f1913d07cd66e84909f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e646117 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild