$ git clone -n https://src.fedoraproject.org/rpms/xapian-core.git /var/lib/mock/f31-build-100707-33301/root/chroot_tmpdir/scmroot/xapian-core
Cloning into '/var/lib/mock/f31-build-100707-33301/root/chroot_tmpdir/scmroot/xapian-core'...
$ git reset --hard 787aa3be3ed279c7bf3c5542a8db68ce424da82e
HEAD is now at 787aa3b 1.4.12