$ git clone -n https://src.fedoraproject.org/rpms/kmahjongg.git /var/lib/mock/f42-build-863598-171716/root/chroot_tmpdir/scmroot/kmahjongg
Cloning into '/var/lib/mock/f42-build-863598-171716/root/chroot_tmpdir/scmroot/kmahjongg'...
$ git fetch origin a1637136fadfd55f42a7a02e01b64ba641011541:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmahjongg
 * [new ref]         a1637136fadfd55f42a7a02e01b64ba641011541 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a163713 24.12.0