$ git clone -n https://src.fedoraproject.org/rpms/rust-libz-ng-sys.git /var/lib/mock/f45-build-42994-799/root/chroot_tmpdir/scmroot/rust-libz-ng-sys
Cloning into '/var/lib/mock/f45-build-42994-799/root/chroot_tmpdir/scmroot/rust-libz-ng-sys'...
$ git fetch origin 0136f810a3351f830e6491553daceac9d8d357fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libz-ng-sys
 * [new ref]         0136f810a3351f830e6491553daceac9d8d357fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0136f81 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild