$ git clone -n https://src.fedoraproject.org/rpms/libtiff.git /var/lib/mock/f40-build-2606852-63595/root/chroot_tmpdir/scmroot/libtiff
Cloning into '/var/lib/mock/f40-build-2606852-63595/root/chroot_tmpdir/scmroot/libtiff'...
$ git fetch origin 0766d194e391c0e2f67c055a1004991dc64cd4b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtiff
 * [new ref]         0766d194e391c0e2f67c055a1004991dc64cd4b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0766d19 migrated to SPDX license