$ git clone -n https://src.fedoraproject.org/rpms/cinnamon-session.git /var/lib/mock/f41-build-837349-159035/root/chroot_tmpdir/scmroot/cinnamon-session
Cloning into '/var/lib/mock/f41-build-837349-159035/root/chroot_tmpdir/scmroot/cinnamon-session'...
$ git fetch origin 9a16491a54164da5d6c8d8d7505ce240ac81604d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cinnamon-session
 * [new ref]         9a16491a54164da5d6c8d8d7505ce240ac81604d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a16491 source