$ git clone -n https://src.fedoraproject.org/rpms/rust-varlink-cli.git /var/lib/mock/f38-build-side-43-rust-devel-1416027-31457/root/chroot_tmpdir/scmroot/rust-varlink-cli
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416027-31457/root/chroot_tmpdir/scmroot/rust-varlink-cli'...
$ git fetch origin 286b782c9b975b9b58d9d2be41eb30b9cdf6381e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-varlink-cli
 * [new ref]         286b782c9b975b9b58d9d2be41eb30b9cdf6381e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 286b782 Rebuild for fixed frame pointer compiler flags in Rust RPM macros