$ git clone -n https://src.fedoraproject.org/rpms/cdrkit.git /var/lib/mock/f41-build-875082-16267/root/chroot_tmpdir/scmroot/cdrkit
Cloning into '/var/lib/mock/f41-build-875082-16267/root/chroot_tmpdir/scmroot/cdrkit'...
$ git fetch origin 8a836099cff3b335a84070fb14631076e52a5a7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cdrkit
 * [new ref]         8a836099cff3b335a84070fb14631076e52a5a7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a83609 Eliminate use of obsolete %patchN syntax (#2283636)