$ git clone -n https://src.fedoraproject.org/rpms/R-repurrrsive.git /var/lib/mock/f38-build-side-42-init-devel-697100-27015/root/chroot_tmpdir/scmroot/R-repurrrsive
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-697100-27015/root/chroot_tmpdir/scmroot/R-repurrrsive'...
$ git fetch origin e011bcedfb9851383130614fa70269a388550c59:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-repurrrsive
 * [new ref]         e011bcedfb9851383130614fa70269a388550c59 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e011bce update to 1.1.0