$ git clone -n https://src.fedoraproject.org/rpms/rust-stderrlog0.5.git /var/lib/mock/f42-build-3234178-41196/root/chroot_tmpdir/scmroot/rust-stderrlog0.5
Cloning into '/var/lib/mock/f42-build-3234178-41196/root/chroot_tmpdir/scmroot/rust-stderrlog0.5'...
$ git fetch origin 090e696f91691c6db0b268d1867f36879846366a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-stderrlog0.5
 * [new ref]         090e696f91691c6db0b268d1867f36879846366a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 090e696 Drop examples and skip doctests which pull in additional dependencies