$ git clone -n https://src.fedoraproject.org/rpms/rust-testing_table.git /var/lib/mock/f41-build-side-1-3137317-39792/root/chroot_tmpdir/scmroot/rust-testing_table
Cloning into '/var/lib/mock/f41-build-side-1-3137317-39792/root/chroot_tmpdir/scmroot/rust-testing_table'...
$ git fetch origin 599a702315968844da6f62218ee02753e9ceb62b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-testing_table
 * [new ref]         599a702315968844da6f62218ee02753e9ceb62b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 599a702 Initial package; Resolves: RHBZ#2326395