$ git clone -n https://src.fedoraproject.org/rpms/fsarchiver.git /var/lib/mock/f31-build-52555-27687/root/thebuilddir/tmp/scmroot/fsarchiver
Cloning into '/var/lib/mock/f31-build-52555-27687/root/thebuilddir/tmp/scmroot/fsarchiver'...
$ git reset --hard b3e7c6a4cd9ee18ca1635acc42f69b3f8b8bcd29
HEAD is now at b3e7c6a Apply upstream commit to fix F30 FTBFS