$ git clone -n https://src.fedoraproject.org/rpms/perl-Time-Elapsed.git /var/lib/mock/f45-build-27186-621/root/chroot_tmpdir/scmroot/perl-Time-Elapsed
Cloning into '/var/lib/mock/f45-build-27186-621/root/chroot_tmpdir/scmroot/perl-Time-Elapsed'...
$ git fetch origin dc06d100ce6ce7fbc1eb0d96e35a7f6be4523de8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Time-Elapsed
 * [new ref]         dc06d100ce6ce7fbc1eb0d96e35a7f6be4523de8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc06d10 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild