$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-CallChecker.git /var/lib/mock/f45-build-23060-595/root/chroot_tmpdir/scmroot/perl-Devel-CallChecker
Cloning into '/var/lib/mock/f45-build-23060-595/root/chroot_tmpdir/scmroot/perl-Devel-CallChecker'...
$ git fetch origin bed8ab8f88ec8a8e77aa42a1dea7357f027884c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-CallChecker
 * [new ref]         bed8ab8f88ec8a8e77aa42a1dea7357f027884c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bed8ab8 Perl 5.44 rebuild