$ git clone -n https://src.fedoraproject.org/rpms/perl-HTTP-BrowserDetect.git /var/lib/mock/f40-build-2212731-52286/root/chroot_tmpdir/scmroot/perl-HTTP-BrowserDetect
Cloning into '/var/lib/mock/f40-build-2212731-52286/root/chroot_tmpdir/scmroot/perl-HTTP-BrowserDetect'...
$ git fetch origin 8a0a92f04393702992fbccc0ab4754f14750f8dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTTP-BrowserDetect
 * [new ref]         8a0a92f04393702992fbccc0ab4754f14750f8dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a0a92f Update to 3.40