$ git clone -n https://src.fedoraproject.org/rpms/mailimporter.git /var/lib/mock/f40-build-769559-125688/root/chroot_tmpdir/scmroot/mailimporter
Cloning into '/var/lib/mock/f40-build-769559-125688/root/chroot_tmpdir/scmroot/mailimporter'...
$ git fetch origin 19890143a72c54af84d97d962c48c97a31c3e2ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mailimporter
 * [new ref]         19890143a72c54af84d97d962c48c97a31c3e2ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1989014 24.01.85