$ git clone -n https://src.fedoraproject.org/rpms/R-RUnit.git /var/lib/mock/f41-build-side-1-3141184-39987/root/chroot_tmpdir/scmroot/R-RUnit
Cloning into '/var/lib/mock/f41-build-side-1-3141184-39987/root/chroot_tmpdir/scmroot/R-RUnit'...
$ git fetch origin 44bb99d8400430ef6de930214ae6b6e3e38d47fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-RUnit
 * [new ref]         44bb99d8400430ef6de930214ae6b6e3e38d47fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 44bb99d convert GPLv2 license to SPDX