$ git clone -n https://src.fedoraproject.org/rpms/tempest.git /var/lib/mock/f45-build-36921-709/root/chroot_tmpdir/scmroot/tempest
Cloning into '/var/lib/mock/f45-build-36921-709/root/chroot_tmpdir/scmroot/tempest'...
$ git fetch origin bb0b96d9ee7b9e84ccfe037169bf725d5f9395d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tempest
 * [new ref]         bb0b96d9ee7b9e84ccfe037169bf725d5f9395d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb0b96d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild