$ git clone -n https://src.fedoraproject.org/rpms/calibre.git /var/lib/mock/f33-build-177195-44868/root/chroot_tmpdir/scmroot/calibre
Cloning into '/var/lib/mock/f33-build-177195-44868/root/chroot_tmpdir/scmroot/calibre'...
$ git reset --hard 28f996effbb8d96a1089196cb7346be2f6248af4
HEAD is now at 28f996e Update to 4.13.0. Fixes bug #1817929