$ git clone -n https://src.fedoraproject.org/rpms/perl-Digest-HMAC.git /var/lib/mock/f45-build-23144-596/root/chroot_tmpdir/scmroot/perl-Digest-HMAC
Cloning into '/var/lib/mock/f45-build-23144-596/root/chroot_tmpdir/scmroot/perl-Digest-HMAC'...
$ git fetch origin 701d3014fb4a935c77957cadc77e9db8c540b1a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Digest-HMAC
 * [new ref]         701d3014fb4a935c77957cadc77e9db8c540b1a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 701d301 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild