$ git clone -n https://src.fedoraproject.org/rpms/gjs.git /var/lib/mock/f40-build-791772-137740/root/chroot_tmpdir/scmroot/gjs
Cloning into '/var/lib/mock/f40-build-791772-137740/root/chroot_tmpdir/scmroot/gjs'...
$ git fetch origin 8ec1f2132d44c9e9b72424293d6a6824a0c82800:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gjs
 * [new ref]         8ec1f2132d44c9e9b72424293d6a6824a0c82800 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ec1f21 Update to 1.79.3