$ git clone -n https://src.fedoraproject.org/rpms/perlbrew.git /var/lib/mock/f39-build-1450730-32757/root/chroot_tmpdir/scmroot/perlbrew
Cloning into '/var/lib/mock/f39-build-1450730-32757/root/chroot_tmpdir/scmroot/perlbrew'...
$ git fetch origin 42c25c25444bf2bea62108a4df99066e56a15cea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perlbrew
 * [new ref]         42c25c25444bf2bea62108a4df99066e56a15cea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42c25c2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild