$ git clone -n https://src.fedoraproject.org/rpms/R-haven.git /var/lib/mock/f40-build-761480-121609/root/chroot_tmpdir/scmroot/R-haven
Cloning into '/var/lib/mock/f40-build-761480-121609/root/chroot_tmpdir/scmroot/R-haven'...
$ git fetch origin 7de514c0ba911d1ad4a68e3e60546617fb1e12b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-haven
 * [new ref]         7de514c0ba911d1ad4a68e3e60546617fb1e12b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7de514c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild