$ git clone -n https://src.fedoraproject.org/rpms/perl-Glib-Object-Introspection.git /var/lib/mock/f41-build-1099113-20020/root/chroot_tmpdir/scmroot/perl-Glib-Object-Introspection
Cloning into '/var/lib/mock/f41-build-1099113-20020/root/chroot_tmpdir/scmroot/perl-Glib-Object-Introspection'...
$ git fetch origin 149f6f44d822b62d6c1ec31eec609c2bbab2d2a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Glib-Object-Introspection
 * [new ref]         149f6f44d822b62d6c1ec31eec609c2bbab2d2a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 149f6f4 Perl 5.40 rebuild