$ git clone -n https://src.fedoraproject.org/rpms/buffer.git /var/lib/mock/f40-build-757055-119118/root/chroot_tmpdir/scmroot/buffer
Cloning into '/var/lib/mock/f40-build-757055-119118/root/chroot_tmpdir/scmroot/buffer'...
$ git fetch origin 14ae7007fb95c4bae4ef7033bb34f1011389427d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/buffer
 * [new ref]         14ae7007fb95c4bae4ef7033bb34f1011389427d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14ae700 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild