$ git clone -n https://src.fedoraproject.org/rpms/perl-HTML-Template-Expr.git /var/lib/mock/f40-build-2202179-51870/root/chroot_tmpdir/scmroot/perl-HTML-Template-Expr
Cloning into '/var/lib/mock/f40-build-2202179-51870/root/chroot_tmpdir/scmroot/perl-HTML-Template-Expr'...
$ git fetch origin a4bab99c68183844a38d121d06a0687f2b45c76c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTML-Template-Expr
 * [new ref]         a4bab99c68183844a38d121d06a0687f2b45c76c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4bab99 Modernize spec file