$ git clone -n https://src.fedoraproject.org/rpms/usd.git /var/lib/mock/f40-build-1956171-25196/root/chroot_tmpdir/scmroot/usd
Cloning into '/var/lib/mock/f40-build-1956171-25196/root/chroot_tmpdir/scmroot/usd'...
$ git fetch origin b38057185ffa1a7938cf5e88293755f065a5a3e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/usd
 * [new ref]         b38057185ffa1a7938cf5e88293755f065a5a3e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b380571 Remove the pyside6 build conditional