$ git clone -n https://src.fedoraproject.org/rpms/R-svglite.git /var/lib/mock/f40-build-1930420-25111/root/chroot_tmpdir/scmroot/R-svglite
Cloning into '/var/lib/mock/f40-build-1930420-25111/root/chroot_tmpdir/scmroot/R-svglite'...
$ git fetch origin 0c16c58f650bd99c7219ed72b29cd42f389e23e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-svglite
 * [new ref]         0c16c58f650bd99c7219ed72b29cd42f389e23e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c16c58 R-maint-sig mass rebuild