$ git clone -n https://src.fedoraproject.org/rpms/libcrystalhd.git /var/lib/mock/f41-build-1045132-19054/root/chroot_tmpdir/scmroot/libcrystalhd
Cloning into '/var/lib/mock/f41-build-1045132-19054/root/chroot_tmpdir/scmroot/libcrystalhd'...
$ git fetch origin 2e9d54fb29c6a836e74cd964e1626c0a24234d29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcrystalhd
 * [new ref]         2e9d54fb29c6a836e74cd964e1626c0a24234d29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e9d54f Eliminate use of obsolete %patchN syntax (#2283636)