$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Caller.git /var/lib/mock/f42-build-876321-179677/root/chroot_tmpdir/scmroot/perl-Devel-Caller
Cloning into '/var/lib/mock/f42-build-876321-179677/root/chroot_tmpdir/scmroot/perl-Devel-Caller'...
$ git fetch origin e83432ae7cc86a6a0061ba8b8fd04fddbd1c7766:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Caller
 * [new ref]         e83432ae7cc86a6a0061ba8b8fd04fddbd1c7766 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e83432a Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild