$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Declare.git /var/lib/mock/f41-build-816920-150476/root/chroot_tmpdir/scmroot/perl-Devel-Declare
Cloning into '/var/lib/mock/f41-build-816920-150476/root/chroot_tmpdir/scmroot/perl-Devel-Declare'...
$ git fetch origin 1f79a0e912fdd40429f296199ba02db128bfddc3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Declare
 * [new ref]         1f79a0e912fdd40429f296199ba02db128bfddc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f79a0e Perl 5.40 re-rebuild of bootstrapped packages