$ git clone -n https://src.fedoraproject.org/rpms/rust-auto_enums.git /var/lib/mock/f45-build-40337-771/root/chroot_tmpdir/scmroot/rust-auto_enums
Cloning into '/var/lib/mock/f45-build-40337-771/root/chroot_tmpdir/scmroot/rust-auto_enums'...
$ git fetch origin 52a20a8b2f48b7200ac9ed1789b6fc0aacf3c7c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-auto_enums
 * [new ref]         52a20a8b2f48b7200ac9ed1789b6fc0aacf3c7c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52a20a8 Update to version 0.8.10; Fixes RHBZ#2488909