$ git clone -n https://src.fedoraproject.org/rpms/csmock.git /var/lib/mock/f40-build-2341725-59787/root/chroot_tmpdir/scmroot/csmock
Cloning into '/var/lib/mock/f40-build-2341725-59787/root/chroot_tmpdir/scmroot/csmock'...
$ git fetch origin 55c73a7aebaabb37c2d42c3e77e46084f91abc38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/csmock
 * [new ref]         55c73a7aebaabb37c2d42c3e77e46084f91abc38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55c73a7 update to latest upstream (3.5.1)