$ git clone -n https://src.fedoraproject.org/rpms/bcachefs-tools.git /var/lib/mock/f40-build-2260825-54422/root/chroot_tmpdir/scmroot/bcachefs-tools
Cloning into '/var/lib/mock/f40-build-2260825-54422/root/chroot_tmpdir/scmroot/bcachefs-tools'...
$ git fetch origin 03c6b1e7269bbb063d8f7bdee40b3725c453c313:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bcachefs-tools
 * [new ref]         03c6b1e7269bbb063d8f7bdee40b3725c453c313 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03c6b1e Update to 1.4.1