$ git clone -n https://src.fedoraproject.org/rpms/R-svglite.git /var/lib/mock/f45-build-6438-348/root/chroot_tmpdir/scmroot/R-svglite
Cloning into '/var/lib/mock/f45-build-6438-348/root/chroot_tmpdir/scmroot/R-svglite'...
$ git fetch origin d07ebc7a54cf32e93557f42aab56eee3dfad19ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-svglite
 * [new ref]         d07ebc7a54cf32e93557f42aab56eee3dfad19ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d07ebc7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild