$ git clone -n https://src.fedoraproject.org/rpms/gbrainy.git /var/lib/mock/f39-build-2564867-62096/root/chroot_tmpdir/scmroot/gbrainy
Cloning into '/var/lib/mock/f39-build-2564867-62096/root/chroot_tmpdir/scmroot/gbrainy'...
$ git fetch origin 63c9500be1b77243a9abd8cfacbf9cd8042f85e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gbrainy
 * [new ref]         63c9500be1b77243a9abd8cfacbf9cd8042f85e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63c9500 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild