$ git clone -n https://src.fedoraproject.org/rpms/manifest-tool.git /var/lib/mock/f39-build-1996262-43957/root/chroot_tmpdir/scmroot/manifest-tool
Cloning into '/var/lib/mock/f39-build-1996262-43957/root/chroot_tmpdir/scmroot/manifest-tool'...
$ git fetch origin 8fa3fac2cb7c8092d27c2b74fe8a3bc3ffaa7686:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/manifest-tool
 * [new ref]         8fa3fac2cb7c8092d27c2b74fe8a3bc3ffaa7686 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fa3fac Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild