$ git clone -n https://src.fedoraproject.org/rpms/kwrited.git /var/lib/mock/f40-build-2104610-50574/root/chroot_tmpdir/scmroot/kwrited
Cloning into '/var/lib/mock/f40-build-2104610-50574/root/chroot_tmpdir/scmroot/kwrited'...
$ git fetch origin cac03ce0fae5af0712b2f6a9af57cf94cc485623:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwrited
 * [new ref]         cac03ce0fae5af0712b2f6a9af57cf94cc485623 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cac03ce Update kwrited.spec