$ git clone -n https://src.fedoraproject.org/rpms/rust-stderrlog.git /var/lib/mock/f42-build-3234144-41196/root/chroot_tmpdir/scmroot/rust-stderrlog
Cloning into '/var/lib/mock/f42-build-3234144-41196/root/chroot_tmpdir/scmroot/rust-stderrlog'...
$ git fetch origin 05aab42599eeb6f76c645e28849609e1beeadfd2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-stderrlog
 * [new ref]         05aab42599eeb6f76c645e28849609e1beeadfd2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05aab42 Drop examples and skip doctests which pull in additional dependencies