$ git clone -n https://src.fedoraproject.org/rpms/R-future.git /var/lib/mock/f45-build-6122-346/root/chroot_tmpdir/scmroot/R-future
Cloning into '/var/lib/mock/f45-build-6122-346/root/chroot_tmpdir/scmroot/R-future'...
$ git fetch origin 28052d1bd62e5349f139a125f6a85c172343c536:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-future
 * [new ref]         28052d1bd62e5349f139a125f6a85c172343c536 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28052d1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild