$ git clone -n https://src.fedoraproject.org/rpms/fetchlog.git /var/lib/mock/f42-build-3275511-41321/root/chroot_tmpdir/scmroot/fetchlog
Cloning into '/var/lib/mock/f42-build-3275511-41321/root/chroot_tmpdir/scmroot/fetchlog'...
$ git fetch origin 8e75327480617baaaeff405ba3b318a94d45d6e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fetchlog
 * [new ref]         8e75327480617baaaeff405ba3b318a94d45d6e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e75327 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild