$ git clone -n https://src.fedoraproject.org/rpms/R-svglite.git /var/lib/mock/f38-build-724168-99404/root/chroot_tmpdir/scmroot/R-svglite
Cloning into '/var/lib/mock/f38-build-724168-99404/root/chroot_tmpdir/scmroot/R-svglite'...
$ git fetch origin 331a49ad5ccb6d3f911fad84b5c9ee7b4307101a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-svglite
 * [new ref]         331a49ad5ccb6d3f911fad84b5c9ee7b4307101a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 331a49a Ignore vignettes