$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-InDistDir.git /var/lib/mock/f45-build-26683-618/root/chroot_tmpdir/scmroot/perl-Test-InDistDir
Cloning into '/var/lib/mock/f45-build-26683-618/root/chroot_tmpdir/scmroot/perl-Test-InDistDir'...
$ git fetch origin 47c18d29b9c1f7e17a3adbd1e1919bcd618a7916:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-InDistDir
 * [new ref]         47c18d29b9c1f7e17a3adbd1e1919bcd618a7916 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47c18d2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild