$ git clone -n https://src.fedoraproject.org/rpms/rust-rustix.git /var/lib/mock/f40-build-2233875-53385/root/chroot_tmpdir/scmroot/rust-rustix
Cloning into '/var/lib/mock/f40-build-2233875-53385/root/chroot_tmpdir/scmroot/rust-rustix'...
$ git fetch origin 340c59eb94489bb0caf87a9af67740a4d5885176:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustix
 * [new ref]         340c59eb94489bb0caf87a9af67740a4d5885176 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 340c59e Update to version 0.38.28; Fixes RHBZ#2252348