$ git clone -n https://src.fedoraproject.org/rpms/gtk4-layer-shell.git /var/lib/mock/f41-build-837026-158946/root/chroot_tmpdir/scmroot/gtk4-layer-shell
Cloning into '/var/lib/mock/f41-build-837026-158946/root/chroot_tmpdir/scmroot/gtk4-layer-shell'...
$ git fetch origin b9c4802ee6221b92553923c3ca93055ee74e8920:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtk4-layer-shell
 * [new ref]         b9c4802ee6221b92553923c3ca93055ee74e8920 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9c4802 test: Disable on s390x arch