$ git clone -n https://src.fedoraproject.org/rpms/rust-input-linux.git /var/lib/mock/f38-build-side-43-rust-devel-1416624-31457/root/chroot_tmpdir/scmroot/rust-input-linux
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416624-31457/root/chroot_tmpdir/scmroot/rust-input-linux'...
$ git fetch origin fa5375b168847c0481b482d0adff3db82fc2d63a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-input-linux
 * [new ref]         fa5375b168847c0481b482d0adff3db82fc2d63a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa5375b Initial import; Fixes: RHBZ#2224812