$ git clone -n https://src.fedoraproject.org/rpms/perl-GooCanvas2-CairoTypes.git /var/lib/mock/f45-build-23787-599/root/chroot_tmpdir/scmroot/perl-GooCanvas2-CairoTypes
Cloning into '/var/lib/mock/f45-build-23787-599/root/chroot_tmpdir/scmroot/perl-GooCanvas2-CairoTypes'...
$ git fetch origin 8f8f2c40e9b45301417ff4b2ebddf29182b0f1f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-GooCanvas2-CairoTypes
 * [new ref]         8f8f2c40e9b45301417ff4b2ebddf29182b0f1f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f8f2c4 Perl 5.44 rebuild