$ git clone -n https://src.fedoraproject.org/rpms/perl-Scalar-Construct.git /var/lib/mock/f45-build-26120-614/root/chroot_tmpdir/scmroot/perl-Scalar-Construct
Cloning into '/var/lib/mock/f45-build-26120-614/root/chroot_tmpdir/scmroot/perl-Scalar-Construct'...
$ git fetch origin 5c0043165f0a5ef78355f336c286765f2b73aabd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Scalar-Construct
 * [new ref]         5c0043165f0a5ef78355f336c286765f2b73aabd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c00431 Perl 5.44 rebuild