$ git clone -n https://src.fedoraproject.org/rpms/rust-petgraph0.7.git /var/lib/mock/f45-build-43828-807/root/chroot_tmpdir/scmroot/rust-petgraph0.7
Cloning into '/var/lib/mock/f45-build-43828-807/root/chroot_tmpdir/scmroot/rust-petgraph0.7'...
$ git fetch origin 9c27db6c7a429c282a081a145ae5f10ba4d2a0e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-petgraph0.7
 * [new ref]         9c27db6c7a429c282a081a145ae5f10ba4d2a0e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c27db6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild