$ git clone -n https://src.fedoraproject.org/rpms/whipper.git /var/lib/mock/f45-build-38366-723/root/chroot_tmpdir/scmroot/whipper
Cloning into '/var/lib/mock/f45-build-38366-723/root/chroot_tmpdir/scmroot/whipper'...
$ git fetch origin f66486329199127cd6cb5b4597be6781291464be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/whipper
 * [new ref]         f66486329199127cd6cb5b4597be6781291464be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f664863 Package python3-pkg-resources is required at runtime.