$ git clone -n https://src.fedoraproject.org/rpms/rust-petgraph0.6.git /var/lib/mock/f45-build-43827-807/root/chroot_tmpdir/scmroot/rust-petgraph0.6
Cloning into '/var/lib/mock/f45-build-43827-807/root/chroot_tmpdir/scmroot/rust-petgraph0.6'...
$ git fetch origin 2cc8886f217c41c86f6af8f13264fb694c4a67dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-petgraph0.6
 * [new ref]         2cc8886f217c41c86f6af8f13264fb694c4a67dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2cc8886 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild