$ git clone -n https://src.fedoraproject.org/rpms/rust-pest_generator.git /var/lib/mock/f41-build-1197746-22354/root/chroot_tmpdir/scmroot/rust-pest_generator
Cloning into '/var/lib/mock/f41-build-1197746-22354/root/chroot_tmpdir/scmroot/rust-pest_generator'...
$ git fetch origin df81ce550ac6a4a478e0d2901c8ea23c86023a15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pest_generator
 * [new ref]         df81ce550ac6a4a478e0d2901c8ea23c86023a15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df81ce5 Update to version 2.7.10; Fixes RHBZ#2262743