$ git clone -n https://src.fedoraproject.org/rpms/perl-Compress-LZF.git /var/lib/mock/f41-build-815879-149783/root/chroot_tmpdir/scmroot/perl-Compress-LZF
Cloning into '/var/lib/mock/f41-build-815879-149783/root/chroot_tmpdir/scmroot/perl-Compress-LZF'...
$ git fetch origin 88d09b08f7ed2bd31c0cf2b457e3599b14c180a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Compress-LZF
 * [new ref]         88d09b08f7ed2bd31c0cf2b457e3599b14c180a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88d09b0 Perl 5.40 rebuild