$ git clone -n https://src.fedoraproject.org/rpms/perl-Compress-Bzip2.git /var/lib/mock/f41-build-816919-150476/root/chroot_tmpdir/scmroot/perl-Compress-Bzip2
Cloning into '/var/lib/mock/f41-build-816919-150476/root/chroot_tmpdir/scmroot/perl-Compress-Bzip2'...
$ git fetch origin 2d20708cc633871f4e27403c3c5c94993a8b6733:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Compress-Bzip2
 * [new ref]         2d20708cc633871f4e27403c3c5c94993a8b6733 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d20708 Perl 5.40 re-rebuild of bootstrapped packages