$ git clone -n https://src.fedoraproject.org/rpms/rust-vcsgraph.git /var/lib/mock/f38-build-side-43-rust-devel-1410161-31414/root/chroot_tmpdir/scmroot/rust-vcsgraph
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1410161-31414/root/chroot_tmpdir/scmroot/rust-vcsgraph'...
$ git fetch origin 5e47d633c2e6a62823fff6b58b122653a48376a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vcsgraph
 * [new ref]         5e47d633c2e6a62823fff6b58b122653a48376a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e47d63 Prevent development-only binaries from being built and installed