$ git clone -n https://src.fedoraproject.org/rpms/rust-linux-raw-sys.git /var/lib/mock/f39-build-1869254-42622/root/chroot_tmpdir/scmroot/rust-linux-raw-sys
Cloning into '/var/lib/mock/f39-build-1869254-42622/root/chroot_tmpdir/scmroot/rust-linux-raw-sys'...
$ git fetch origin fa7f82c352c9f071ffed9c2b817d04691aed60f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-linux-raw-sys
 * [new ref]         fa7f82c352c9f071ffed9c2b817d04691aed60f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa7f82c Update to version 0.4.11