$ git clone -n https://src.fedoraproject.org/rpms/rust-rustix0.37.git /var/lib/mock/f39-build-1509922-35458/root/chroot_tmpdir/scmroot/rust-rustix0.37
Cloning into '/var/lib/mock/f39-build-1509922-35458/root/chroot_tmpdir/scmroot/rust-rustix0.37'...
$ git fetch origin 0c3bec1f64d191445f2fc662ea62048fbf0438c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustix0.37
 * [new ref]         0c3bec1f64d191445f2fc662ea62048fbf0438c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c3bec1 Update to version 0.37.26