$ git clone -n https://src.fedoraproject.org/rpms/m17n-lib.git /var/lib/mock/f40-build-1967983-25215/root/chroot_tmpdir/scmroot/m17n-lib
Cloning into '/var/lib/mock/f40-build-1967983-25215/root/chroot_tmpdir/scmroot/m17n-lib'...
$ git fetch origin 4c29553301a3de7ee0ed4a04d7e983be81c0ad50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/m17n-lib
 * [new ref]         4c29553301a3de7ee0ed4a04d7e983be81c0ad50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c29553 Convert CI test to tmt