$ git clone -n https://src.fedoraproject.org/rpms/cyrus-imapd.git /var/lib/mock/f31-build-67555-30057/root/chroot_tmpdir/scmroot/cyrus-imapd
Cloning into '/var/lib/mock/f31-build-67555-30057/root/chroot_tmpdir/scmroot/cyrus-imapd'...
$ git reset --hard ffe2bf266fdec7f0e9dae67d17644bdc62e2c24d
HEAD is now at ffe2bf2 Update sources file.