$ git clone -n https://src.fedoraproject.org/rpms/perl-Carp-Always.git /var/lib/mock/f45-build-22249-590/root/chroot_tmpdir/scmroot/perl-Carp-Always
Cloning into '/var/lib/mock/f45-build-22249-590/root/chroot_tmpdir/scmroot/perl-Carp-Always'...
$ git fetch origin e3f635afc9a00452c749d4691d128c281caaf64c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Carp-Always
 * [new ref]         e3f635afc9a00452c749d4691d128c281caaf64c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3f635a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild