$ git clone -n https://src.fedoraproject.org/rpms/perl-Expect.git /var/lib/mock/f45-build-23358-597/root/chroot_tmpdir/scmroot/perl-Expect
Cloning into '/var/lib/mock/f45-build-23358-597/root/chroot_tmpdir/scmroot/perl-Expect'...
$ git fetch origin 57da3e35fd1abf4e0e364523d26bb82549211e8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Expect
 * [new ref]         57da3e35fd1abf4e0e364523d26bb82549211e8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57da3e3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild