$ git clone -n https://src.fedoraproject.org/rpms/perl-Auth-Yubikey_WebClient.git /var/lib/mock/f45-build-21812-588/root/chroot_tmpdir/scmroot/perl-Auth-Yubikey_WebClient
Cloning into '/var/lib/mock/f45-build-21812-588/root/chroot_tmpdir/scmroot/perl-Auth-Yubikey_WebClient'...
$ git fetch origin f8e8a52e879f8a5432f4263941a2b1fc38bebc32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Auth-Yubikey_WebClient
 * [new ref]         f8e8a52e879f8a5432f4263941a2b1fc38bebc32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8e8a52 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild