$ git clone -n https://src.fedoraproject.org/rpms/gi-docgen.git /var/lib/mock/f40-build-2208225-52124/root/chroot_tmpdir/scmroot/gi-docgen
Cloning into '/var/lib/mock/f40-build-2208225-52124/root/chroot_tmpdir/scmroot/gi-docgen'...
$ git fetch origin 1db67ba675e2c2179f5274209227b314638042e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gi-docgen
 * [new ref]         1db67ba675e2c2179f5274209227b314638042e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1db67ba Add patch to fix broken Since/Obsoletes