$ git clone -n https://src.fedoraproject.org/rpms/rust-struct-patch.git /var/lib/mock/f38-build-side-42-init-devel-1083479-29934/root/chroot_tmpdir/scmroot/rust-struct-patch
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1083479-29934/root/chroot_tmpdir/scmroot/rust-struct-patch'...
$ git fetch origin 0fabac745ad8cfb05b66deb8f279ad4cae4eea71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-struct-patch
 * [new ref]         0fabac745ad8cfb05b66deb8f279ad4cae4eea71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fabac7 Initial import (#2227545)