$ git clone -n https://src.fedoraproject.org/rpms/rubygem-posix-spawn.git /var/lib/mock/f33-build-297503-55940/root/chroot_tmpdir/scmroot/rubygem-posix-spawn
Cloning into '/var/lib/mock/f33-build-297503-55940/root/chroot_tmpdir/scmroot/rubygem-posix-spawn'...
$ git reset --hard b951762fcde00c0a8b9645632085e5e7267bee1f
HEAD is now at b951762 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild