$ git clone -n https://src.fedoraproject.org/rpms/calamaris.git /var/lib/mock/f45-build-4600-333/root/chroot_tmpdir/scmroot/calamaris
Cloning into '/var/lib/mock/f45-build-4600-333/root/chroot_tmpdir/scmroot/calamaris'...
$ git fetch origin 6c0b7dfdf0da6be37bfdfe4ab2c5d27fdfbd5fd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/calamaris
 * [new ref]         6c0b7dfdf0da6be37bfdfe4ab2c5d27fdfbd5fd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c0b7df Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild