$ git clone -n https://src.fedoraproject.org/rpms/nyancat.git /var/lib/mock/f42-build-3282748-41399/root/chroot_tmpdir/scmroot/nyancat
Cloning into '/var/lib/mock/f42-build-3282748-41399/root/chroot_tmpdir/scmroot/nyancat'...
$ git fetch origin 6e216e45b48129c4442d012014e4c8018f434a97:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nyancat
 * [new ref]         6e216e45b48129c4442d012014e4c8018f434a97 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e216e4 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild