$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo_metadata0.17.git /var/lib/mock/f40-build-2100112-50451/root/chroot_tmpdir/scmroot/rust-cargo_metadata0.17
Cloning into '/var/lib/mock/f40-build-2100112-50451/root/chroot_tmpdir/scmroot/rust-cargo_metadata0.17'...
$ git fetch origin d0384b0a5d321cf8ea9aee9b162734bb94428897:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo_metadata0.17
 * [new ref]         d0384b0a5d321cf8ea9aee9b162734bb94428897 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0384b0 Initial import (cargo_metadata 0.17 compat package)