$ git clone -n https://src.fedoraproject.org/rpms/xsane.git /var/lib/mock/f39-build-1595588-38327/root/chroot_tmpdir/scmroot/xsane
Cloning into '/var/lib/mock/f39-build-1595588-38327/root/chroot_tmpdir/scmroot/xsane'...
$ git fetch origin 43c3bf9ca505928821232d4fe1e8a04d77d2fce1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xsane
 * [new ref]         43c3bf9ca505928821232d4fe1e8a04d77d2fce1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43c3bf9 Use AND in license tag