$ git clone -n https://src.fedoraproject.org/rpms/perl-Syntax-Operator-In.git /var/lib/mock/f39-build-1802403-41809/root/chroot_tmpdir/scmroot/perl-Syntax-Operator-In
Cloning into '/var/lib/mock/f39-build-1802403-41809/root/chroot_tmpdir/scmroot/perl-Syntax-Operator-In'...
$ git fetch origin 33e1866b96695a27de01e574bc53955bfb4da2e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Syntax-Operator-In
 * [new ref]         33e1866b96695a27de01e574bc53955bfb4da2e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 33e1866 0.06 bump