$ git clone -n https://src.fedoraproject.org/rpms/rust-rustix0.37.git /var/lib/mock/f38-build-side-43-rust-devel-1411739-31436/root/chroot_tmpdir/scmroot/rust-rustix0.37
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411739-31436/root/chroot_tmpdir/scmroot/rust-rustix0.37'...
$ git fetch origin acb52bf382687108aec18db2e0c8e78e854d76ce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustix0.37
 * [new ref]         acb52bf382687108aec18db2e0c8e78e854d76ce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at acb52bf Initial import (rustix 0.37 compat package)