$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk3.git /var/lib/mock/f39-build-1572943-37795/root/chroot_tmpdir/scmroot/perl-Gtk3
Cloning into '/var/lib/mock/f39-build-1572943-37795/root/chroot_tmpdir/scmroot/perl-Gtk3'...
$ git fetch origin 9cdbb5be329e24c9532ee8dd611211095b170231:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk3
 * [new ref]         9cdbb5be329e24c9532ee8dd611211095b170231 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9cdbb5b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild