$ git clone -n https://src.fedoraproject.org/rpms/librx.git /var/lib/mock/f39-build-1800353-41793/root/chroot_tmpdir/scmroot/librx
Cloning into '/var/lib/mock/f39-build-1800353-41793/root/chroot_tmpdir/scmroot/librx'...
$ git fetch origin 6580dbdf769e4931efe21109a42b509f45d7da89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librx
 * [new ref]         6580dbdf769e4931efe21109a42b509f45d7da89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6580dbd Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild