$ git clone -n https://src.fedoraproject.org/rpms/perl-File-Tempdir.git /var/lib/mock/f45-build-23584-598/root/chroot_tmpdir/scmroot/perl-File-Tempdir
Cloning into '/var/lib/mock/f45-build-23584-598/root/chroot_tmpdir/scmroot/perl-File-Tempdir'...
$ git fetch origin cbd4c3a3d1c0215924ec80dcef1d5e092b90ad1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-File-Tempdir
 * [new ref]         cbd4c3a3d1c0215924ec80dcef1d5e092b90ad1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbd4c3a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild