$ git clone -n https://src.fedoraproject.org/rpms/chessx.git /var/lib/mock/f41-build-side-1-2656052-28431/root/chroot_tmpdir/scmroot/chessx
Cloning into '/var/lib/mock/f41-build-side-1-2656052-28431/root/chroot_tmpdir/scmroot/chessx'...
$ git fetch origin 51f1508bba53da300dae0aed0dc2219902f0e215:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chessx
 * [new ref]         51f1508bba53da300dae0aed0dc2219902f0e215 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51f1508 Update to version 1.6.2 (fedora#2310496)