$ git clone -n https://src.fedoraproject.org/rpms/rubygem-goocanvas.git /var/lib/mock/f41-build-1107973-20090/root/chroot_tmpdir/scmroot/rubygem-goocanvas
Cloning into '/var/lib/mock/f41-build-1107973-20090/root/chroot_tmpdir/scmroot/rubygem-goocanvas'...
$ git fetch origin f76a5ec5d811c0bf735734a250fc881b0d13db0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-goocanvas
 * [new ref]         f76a5ec5d811c0bf735734a250fc881b0d13db0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f76a5ec Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild