$ git clone -n https://src.fedoraproject.org/rpms/rust-pest_generator.git /var/lib/mock/f42-build-side-1-3539525-46565/root/chroot_tmpdir/scmroot/rust-pest_generator
Cloning into '/var/lib/mock/f42-build-side-1-3539525-46565/root/chroot_tmpdir/scmroot/rust-pest_generator'...
$ git fetch origin a076df77373adef121c93217099485b8f3557d15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pest_generator
 * [new ref]         a076df77373adef121c93217099485b8f3557d15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a076df7 Update to version 2.8.0; Fixes RHBZ#2354773