$ git clone -n https://src.fedoraproject.org/rpms/cdsclient.git /var/lib/mock/f45-build-4283-331/root/chroot_tmpdir/scmroot/cdsclient
Cloning into '/var/lib/mock/f45-build-4283-331/root/chroot_tmpdir/scmroot/cdsclient'...
$ git fetch origin 8d64bab4a303f3a9fc646aed03425094b53cab63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cdsclient
 * [new ref]         8d64bab4a303f3a9fc646aed03425094b53cab63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d64bab Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild