$ git clone -n https://src.fedoraproject.org/rpms/R-evaluate.git /var/lib/mock/f39-build-1536044-36257/root/chroot_tmpdir/scmroot/R-evaluate
Cloning into '/var/lib/mock/f39-build-1536044-36257/root/chroot_tmpdir/scmroot/R-evaluate'...
$ git fetch origin 000d318ffdfe6b3e962e8c38e99c09b254b0fb2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-evaluate
 * [new ref]         000d318ffdfe6b3e962e8c38e99c09b254b0fb2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 000d318 Update to 0.22