$ git clone -n https://src.fedoraproject.org/rpms/R-farver.git /var/lib/mock/f39-build-1523988-36022/root/chroot_tmpdir/scmroot/R-farver
Cloning into '/var/lib/mock/f39-build-1523988-36022/root/chroot_tmpdir/scmroot/R-farver'...
$ git fetch origin 47bccda28d3ad9e9c54d1aa0707c2d3a9e03a5b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-farver
 * [new ref]         47bccda28d3ad9e9c54d1aa0707c2d3a9e03a5b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47bccda Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild