$ git clone -n https://src.fedoraproject.org/rpms/perl-Syntax-Keyword-Defer.git /var/lib/mock/f41-build-816873-150476/root/chroot_tmpdir/scmroot/perl-Syntax-Keyword-Defer
Cloning into '/var/lib/mock/f41-build-816873-150476/root/chroot_tmpdir/scmroot/perl-Syntax-Keyword-Defer'...
$ git fetch origin f8bfe0db95d13d494ed8e2febef3f3fbe47f351c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Syntax-Keyword-Defer
 * [new ref]         f8bfe0db95d13d494ed8e2febef3f3fbe47f351c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8bfe0d Perl 5.40 re-rebuild of bootstrapped packages