$ git clone -n https://src.fedoraproject.org/rpms/perl-Getopt-Long.git /var/lib/mock/f40-build-2202099-51867/root/chroot_tmpdir/scmroot/perl-Getopt-Long
Cloning into '/var/lib/mock/f40-build-2202099-51867/root/chroot_tmpdir/scmroot/perl-Getopt-Long'...
$ git fetch origin 513dc5e1908b1b885ca67e8c27593583e4fa8555:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Getopt-Long
 * [new ref]         513dc5e1908b1b885ca67e8c27593583e4fa8555 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 513dc5e 2.57 bump (rhbz#2249036)