$ git clone -n https://src.fedoraproject.org/rpms/bindfs.git /var/lib/mock/f40-build-2225797-52868/root/chroot_tmpdir/scmroot/bindfs
Cloning into '/var/lib/mock/f40-build-2225797-52868/root/chroot_tmpdir/scmroot/bindfs'...
$ git fetch origin f4851997c4c2045701fc451374c2b89269e82d01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bindfs
 * [new ref]         f4851997c4c2045701fc451374c2b89269e82d01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f485199 opt-in to autochangelog