$ git clone -n https://src.fedoraproject.org/rpms/apt-cacher-ng.git /var/lib/mock/f40-build-1956623-25197/root/chroot_tmpdir/scmroot/apt-cacher-ng
Cloning into '/var/lib/mock/f40-build-1956623-25197/root/chroot_tmpdir/scmroot/apt-cacher-ng'...
$ git fetch origin ed6a26cb529d82eed5fb3b5fb13577f2fa21fb81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apt-cacher-ng
 * [new ref]         ed6a26cb529d82eed5fb3b5fb13577f2fa21fb81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed6a26c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild