$ git clone -n https://src.fedoraproject.org/rpms/golang-github-apache-arrow.git /var/lib/mock/f39-build-1907325-42871/root/chroot_tmpdir/scmroot/golang-github-apache-arrow
Cloning into '/var/lib/mock/f39-build-1907325-42871/root/chroot_tmpdir/scmroot/golang-github-apache-arrow'...
$ git fetch origin 4cbfa3274c05d42d94c2119861a68d8828507541:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-apache-arrow
 * [new ref]         4cbfa3274c05d42d94c2119861a68d8828507541 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4cbfa32 Bump release and update changelog