$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-TempDir-Tiny.git /var/lib/mock/f45-build-26867-619/root/chroot_tmpdir/scmroot/perl-Test-TempDir-Tiny
Cloning into '/var/lib/mock/f45-build-26867-619/root/chroot_tmpdir/scmroot/perl-Test-TempDir-Tiny'...
$ git fetch origin 27bd86ec22fcb1a707453dae9d0a109074c5032f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-TempDir-Tiny
 * [new ref]         27bd86ec22fcb1a707453dae9d0a109074c5032f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27bd86e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild