$ git clone -n https://src.fedoraproject.org/rpms/rust-stable_deref_trait.git /var/lib/mock/f45-build-45121-821/root/chroot_tmpdir/scmroot/rust-stable_deref_trait
Cloning into '/var/lib/mock/f45-build-45121-821/root/chroot_tmpdir/scmroot/rust-stable_deref_trait'...
$ git fetch origin 6f529bb7d8fa155f1c9da80d9734d99a3e5be388:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-stable_deref_trait
 * [new ref]         6f529bb7d8fa155f1c9da80d9734d99a3e5be388 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f529bb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild