$ git clone -n https://src.fedoraproject.org/rpms/rust-diesel_derives.git /var/lib/mock/f41-build-side-1-2907229-34727/root/chroot_tmpdir/scmroot/rust-diesel_derives
Cloning into '/var/lib/mock/f41-build-side-1-2907229-34727/root/chroot_tmpdir/scmroot/rust-diesel_derives'...
$ git fetch origin e1f147b3edc7b326a55afc23607224cbd6226c00:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-diesel_derives
 * [new ref]         e1f147b3edc7b326a55afc23607224cbd6226c00 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1f147b Update to version 2.2.3; Fixes RHBZ#2307519