$ git clone -n https://src.fedoraproject.org/rpms/rust-linux-raw-sys.git /var/lib/mock/f41-build-side-1-2992826-36016/root/chroot_tmpdir/scmroot/rust-linux-raw-sys
Cloning into '/var/lib/mock/f41-build-side-1-2992826-36016/root/chroot_tmpdir/scmroot/rust-linux-raw-sys'...
$ git fetch origin 92a4ce766b1df717068da8be6f7c27e34d6c10c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-linux-raw-sys
 * [new ref]         92a4ce766b1df717068da8be6f7c27e34d6c10c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92a4ce7 Update to version 0.6.5; Fixes RHBZ#2305341