$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-datastructures.git /var/lib/mock/f42-build-887456-188289/root/chroot_tmpdir/scmroot/gap-pkg-datastructures
Cloning into '/var/lib/mock/f42-build-887456-188289/root/chroot_tmpdir/scmroot/gap-pkg-datastructures'...
$ git fetch origin 1884b07587bf25c64aa942ffd89f82820d3e0186:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-datastructures
 * [new ref]         1884b07587bf25c64aa942ffd89f82820d3e0186 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1884b07 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild