$ git clone -n https://src.fedoraproject.org/rpms/libguestfs.git /var/lib/mock/f40-build-746913-112888/root/chroot_tmpdir/scmroot/libguestfs
Cloning into '/var/lib/mock/f40-build-746913-112888/root/chroot_tmpdir/scmroot/libguestfs'...
$ git reset --hard 78db1505556a6b0303d8301710657994ad558d1b
HEAD is now at 78db150 New upstream development version 1.51.8