$ git clone -n https://src.fedoraproject.org/rpms/R-utf8 /var/lib/mock/f41-build-side-1-3149145-40244/root/chroot_tmpdir/scmroot/R-utf8
Cloning into '/var/lib/mock/f41-build-side-1-3149145-40244/root/chroot_tmpdir/scmroot/R-utf8'...
$ git fetch origin bac75470002b37e8d33581399386c9758400ae8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-utf8
 * [new ref]         bac75470002b37e8d33581399386c9758400ae8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bac7547 convert ASL 2.0 license to SPDX