$ git clone -n https://src.fedoraproject.org/rpms/exim.git /var/lib/mock/f40-build-795825-140332/root/chroot_tmpdir/scmroot/exim
Cloning into '/var/lib/mock/f40-build-795825-140332/root/chroot_tmpdir/scmroot/exim'...
$ git fetch origin f5646d191586df20e8db9132f4a6a9e509a4a738:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exim
 * [new ref]         f5646d191586df20e8db9132f4a6a9e509a4a738 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5646d1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild