$ git clone -n https://src.fedoraproject.org/rpms/gnupg2.git /var/lib/mock/f39-build-1493575-34539/root/chroot_tmpdir/scmroot/gnupg2
Cloning into '/var/lib/mock/f39-build-1493575-34539/root/chroot_tmpdir/scmroot/gnupg2'...
$ git fetch origin 9cb2d1dbba969f01aa182a94245d7874434f88a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnupg2
 * [new ref]         9cb2d1dbba969f01aa182a94245d7874434f88a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9cb2d1d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild