$ git clone -n https://src.fedoraproject.org/rpms/R-mime.git /var/lib/mock/f39-build-1496066-34546/root/chroot_tmpdir/scmroot/R-mime
Cloning into '/var/lib/mock/f39-build-1496066-34546/root/chroot_tmpdir/scmroot/R-mime'...
$ git fetch origin 99957facff9d3bf101c577fce53818de7271e4c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-mime
 * [new ref]         99957facff9d3bf101c577fce53818de7271e4c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 99957fa Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild