$ git clone -n https://src.fedoraproject.org/rpms/xfsprogs.git /var/lib/mock/f39-build-1591359-38283/root/chroot_tmpdir/scmroot/xfsprogs
Cloning into '/var/lib/mock/f39-build-1591359-38283/root/chroot_tmpdir/scmroot/xfsprogs'...
$ git fetch origin bd0d4d33a76fd614b5ffd22099544b90d8b3a426:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfsprogs
 * [new ref]         bd0d4d33a76fd614b5ffd22099544b90d8b3a426 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd0d4d3 Rebase to upstream 6.4.0