$ git clone -n https://src.fedoraproject.org/rpms/rust-ptr_meta_derive.git /var/lib/mock/f45-build-44102-810/root/chroot_tmpdir/scmroot/rust-ptr_meta_derive
Cloning into '/var/lib/mock/f45-build-44102-810/root/chroot_tmpdir/scmroot/rust-ptr_meta_derive'...
$ git fetch origin be58e5d6752c0f6d954ff4bdad8cac00c385d708:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ptr_meta_derive
 * [new ref]         be58e5d6752c0f6d954ff4bdad8cac00c385d708 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be58e5d Update to version 0.3.2; Fixes RHBZ#2511532