$ git clone -n https://src.fedoraproject.org/rpms/perl-HTTP-Message.git /var/lib/mock/f45-build-24021-601/root/chroot_tmpdir/scmroot/perl-HTTP-Message
Cloning into '/var/lib/mock/f45-build-24021-601/root/chroot_tmpdir/scmroot/perl-HTTP-Message'...
$ git fetch origin 1aa6017f12ab5631a612fe1879a8da1cc7777e7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTTP-Message
 * [new ref]         1aa6017f12ab5631a612fe1879a8da1cc7777e7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1aa6017 7.04 bump