$ git clone -n https://src.fedoraproject.org/rpms/epix.git /var/lib/mock/f39-build-1625482-39173/root/chroot_tmpdir/scmroot/epix
Cloning into '/var/lib/mock/f39-build-1625482-39173/root/chroot_tmpdir/scmroot/epix'...
$ git fetch origin 16a68e3a4004edb9131708598a786b0e5ce853ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/epix
 * [new ref]         16a68e3a4004edb9131708598a786b0e5ce853ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16a68e3 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild