$ git clone -n https://src.fedoraproject.org/rpms/perl-Scope-Upper.git /var/lib/mock/f45-build-26179-616/root/chroot_tmpdir/scmroot/perl-Scope-Upper
Cloning into '/var/lib/mock/f45-build-26179-616/root/chroot_tmpdir/scmroot/perl-Scope-Upper'...
$ git fetch origin 7830dff16585e5518a7cc7f99cabf503f7d5bfd1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Scope-Upper
 * [new ref]         7830dff16585e5518a7cc7f99cabf503f7d5bfd1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7830dff Perl 5.44 rebuild