$ git clone -n https://src.fedoraproject.org/rpms/rust-web_atoms.git /var/lib/mock/f45-build-46162-831/root/chroot_tmpdir/scmroot/rust-web_atoms
Cloning into '/var/lib/mock/f45-build-46162-831/root/chroot_tmpdir/scmroot/rust-web_atoms'...
$ git fetch origin 3a1718a9f2e384ef241d2b1672e61594a5e49e4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-web_atoms
 * [new ref]         3a1718a9f2e384ef241d2b1672e61594a5e49e4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a1718a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild