$ git clone -n https://src.fedoraproject.org/rpms/rust-codespan.git /var/lib/mock/f45-build-40860-776/root/chroot_tmpdir/scmroot/rust-codespan
Cloning into '/var/lib/mock/f45-build-40860-776/root/chroot_tmpdir/scmroot/rust-codespan'...
$ git fetch origin 7989ce639c0e2a862ef2d3bc8826552677c8d602:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-codespan
 * [new ref]         7989ce639c0e2a862ef2d3bc8826552677c8d602 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7989ce6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild