$ git clone -n https://src.fedoraproject.org/rpms/python-carbon.git /var/lib/mock/f39-build-1691499-41137/root/chroot_tmpdir/scmroot/python-carbon
Cloning into '/var/lib/mock/f39-build-1691499-41137/root/chroot_tmpdir/scmroot/python-carbon'...
$ git fetch origin 4d8f7c621b261b29649bfd4a198326eda6fa1be5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-carbon
 * [new ref]         4d8f7c621b261b29649bfd4a198326eda6fa1be5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d8f7c6 Patch for Python 3.12 support