$ git clone -n https://src.fedoraproject.org/rpms/c-graph.git /var/lib/mock/f41-build-side-1-2632717-25835/root/chroot_tmpdir/scmroot/c-graph
Cloning into '/var/lib/mock/f41-build-side-1-2632717-25835/root/chroot_tmpdir/scmroot/c-graph'...
$ git fetch origin b9968d78694d92b5777df47195e33888baf0b2ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/c-graph
 * [new ref]         b9968d78694d92b5777df47195e33888baf0b2ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9968d7 convert GPLv3+ license to SPDX