$ git clone -n https://src.fedoraproject.org/rpms/vecmath1.2.git /var/lib/mock/f39-build-1558401-37305/root/chroot_tmpdir/scmroot/vecmath1.2
Cloning into '/var/lib/mock/f39-build-1558401-37305/root/chroot_tmpdir/scmroot/vecmath1.2'...
$ git fetch origin 3e644c83efea46993f5f1e1a83f7641191392fe1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vecmath1.2
 * [new ref]         3e644c83efea46993f5f1e1a83f7641191392fe1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e644c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild