$ git clone -n https://src.fedoraproject.org/rpms/libfakekey.git /var/lib/mock/f45-build-16146-483/root/chroot_tmpdir/scmroot/libfakekey
Cloning into '/var/lib/mock/f45-build-16146-483/root/chroot_tmpdir/scmroot/libfakekey'...
$ git fetch origin 655abe9889723a3252d0a10d3c41c88dd53bddc4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libfakekey
 * [new ref]         655abe9889723a3252d0a10d3c41c88dd53bddc4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 655abe9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild