$ git clone -n https://src.fedoraproject.org/rpms/golang-github-t3rm1n4l-mega.git /var/lib/mock/f40-build-2289207-55844/root/chroot_tmpdir/scmroot/golang-github-t3rm1n4l-mega
Cloning into '/var/lib/mock/f40-build-2289207-55844/root/chroot_tmpdir/scmroot/golang-github-t3rm1n4l-mega'...
$ git fetch origin 4421b3a766f745fadf0a1bc841704defd178aaee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-t3rm1n4l-mega
 * [new ref]         4421b3a766f745fadf0a1bc841704defd178aaee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4421b3a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild