$ git clone -n https://src.fedoraproject.org/rpms/libheif.git /var/lib/mock/f40-build-738734-108100/root/chroot_tmpdir/scmroot/libheif
Cloning into '/var/lib/mock/f40-build-738734-108100/root/chroot_tmpdir/scmroot/libheif'...
$ git reset --hard b819c50e176a3d02655838463cd8e739d18fb9a2
HEAD is now at b819c50 Merge branch 'f38' into f39