$ git clone -n https://src.fedoraproject.org/rpms/libchewing.git /var/lib/mock/f45-build-15968-481/root/chroot_tmpdir/scmroot/libchewing
Cloning into '/var/lib/mock/f45-build-15968-481/root/chroot_tmpdir/scmroot/libchewing'...
$ git fetch origin 2199d20fb9ee42bd14aded186a1935fa0951739c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libchewing
 * [new ref]         2199d20fb9ee42bd14aded186a1935fa0951739c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2199d20 Update clap_mangen from 0.2 to 0.3