$ git clone -n https://src.fedoraproject.org/rpms/hulk.git /var/lib/mock/f39-build-1463129-33396/root/chroot_tmpdir/scmroot/hulk
Cloning into '/var/lib/mock/f39-build-1463129-33396/root/chroot_tmpdir/scmroot/hulk'...
$ git fetch origin 4950794b218e4783c9fc3c67bc630dc8211790a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hulk
 * [new ref]         4950794b218e4783c9fc3c67bc630dc8211790a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4950794 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild