$ git clone -n https://src.fedoraproject.org/rpms/perl-URI.git /var/lib/mock/f45-build-27259-622/root/chroot_tmpdir/scmroot/perl-URI
Cloning into '/var/lib/mock/f45-build-27259-622/root/chroot_tmpdir/scmroot/perl-URI'...
$ git fetch origin 6ca44fdaeb1fd5853f96a1218bbe4d69fbf47148:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-URI
 * [new ref]         6ca44fdaeb1fd5853f96a1218bbe4d69fbf47148 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ca44fd 5.36 bump (rhbz#2520744)