$ git clone -n https://src.fedoraproject.org/rpms/libsigc++20.git /var/lib/mock/f41-build-826920-154946/root/chroot_tmpdir/scmroot/libsigc++20
Cloning into '/var/lib/mock/f41-build-826920-154946/root/chroot_tmpdir/scmroot/libsigc++20'...
$ git fetch origin 4b2f216ae8db24496a33c36c900082ca410685b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsigc++20
 * [new ref]         4b2f216ae8db24496a33c36c900082ca410685b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b2f216 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild