$ git clone -n https://src.fedoraproject.org/rpms/rubygem-bcrypt.git /var/lib/mock/f31-build-50850-27442/root/chroot_tmpdir/scmroot/rubygem-bcrypt
Cloning into '/var/lib/mock/f31-build-50850-27442/root/chroot_tmpdir/scmroot/rubygem-bcrypt'...
$ git reset --hard 0b290860964b84ea80e8159cfd64772bb28e1665
HEAD is now at 0b29086 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild