$ git clone -n https://src.fedoraproject.org/rpms/f39-backgrounds.git /var/lib/mock/f45-build-8615-392/root/chroot_tmpdir/scmroot/f39-backgrounds
Cloning into '/var/lib/mock/f45-build-8615-392/root/chroot_tmpdir/scmroot/f39-backgrounds'...
$ git fetch origin cbac64c971227ca152a4723833c4700a37a6c368:KOJI_FETCH_HEAD
fatal: unable to access 'https://src.fedoraproject.org/rpms/f39-backgrounds.git/': Recv failure: Connection reset by peer
$ git reset --hard cbac64c971227ca152a4723833c4700a37a6c368
HEAD is now at cbac64c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild