$ git clone -n https://src.fedoraproject.org/rpms/python-nihtest.git /var/lib/mock/f45-build-31720-655/root/chroot_tmpdir/scmroot/python-nihtest
Cloning into '/var/lib/mock/f45-build-31720-655/root/chroot_tmpdir/scmroot/python-nihtest'...
$ git fetch origin 7a465faa168839b34b0c62753b7aa379929ef85b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nihtest
 * [new ref]         7a465faa168839b34b0c62753b7aa379929ef85b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a465fa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild