$ git clone -n https://src.fedoraproject.org/rpms/rust-rav1e.git /var/lib/mock/f40-build-2288008-55765/root/chroot_tmpdir/scmroot/rust-rav1e
Cloning into '/var/lib/mock/f40-build-2288008-55765/root/chroot_tmpdir/scmroot/rust-rav1e'...
$ git fetch origin fbbaade42a94e333e750300a5f41adb896be6304:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rav1e
 * [new ref]         fbbaade42a94e333e750300a5f41adb896be6304 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbbaade Compatibility fixes for cargo-c v0.9.26 and newer