$ git clone -n https://src.fedoraproject.org/rpms/efax.git /var/lib/mock/f45-build-7965-371/root/chroot_tmpdir/scmroot/efax
Cloning into '/var/lib/mock/f45-build-7965-371/root/chroot_tmpdir/scmroot/efax'...
$ git fetch origin 0fffcb5f65a0bee87ecabf9e4af8c6bd26caf5fd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/efax
 * [new ref]         0fffcb5f65a0bee87ecabf9e4af8c6bd26caf5fd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fffcb5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild